Fits I and 1-1/16 switches up to 1-5/8 long. One socket with the correct length to fit most 1 and 1-1/16 oil pressure switches (for vehicles equipped with warning lights). 1-7/8 overall height for clearance. Use with 3/8 drive or 1-1/8 hex. Skin-packed Shipping wt. 5 oz.